LASED IMS: Louisiana Sedimentary and Environmental Database Internet Map Server

LASED IMS

Louisiana Sedimentary and Environmental Database
LASED IMS

LASED (Louisiana Sedimentary and Environmental Database) is the result of combined efforts of the U.S. Geological Survey and academic collaborators to manage decades of geologic data from the Louisiana coastal zone. The database incorporates a wide range of data types (sediment-sample logs and analyses, geophysical profiles, raster-image basemaps, logbooks, etc) that are integrated with spatial data to provide processing and visualization capabilities using standard GIS and Internet-browsing tools. The public can access the database by using the LASED IMS to view the data and create map products. For further information about the database or to obtain copies of the data, contact B. Dwyer.

Please be patient. The LASED IMS is accessing a large database with detailed layers, and response time may be slow.

For help on how to use any of the tools, click on the red question mark in the upper left-hand corner labeled Tools Help.

Important browser settings:

Some tools in the LASED IMS viewer require the use of popup windows. For full functionality, please modify your browser settings to enable JavaScript and allow popups from this site.

To be fully functional, some visualization tools require the use of Internet Explorer 6 for Windows or Firefox 1.5 for all platforms. These items will have further instructions located at the top of the page.

Enter the LASED IMS

Scheduled Future Developments:

Extract Data tool
Addition of Digital Data Series 79
Williams, S.J., Reid, J.M., Cross, V.A., and Polloni, C.F., 2003, Coastal erosion and wetland change in Louisiana: selected USGS products: U.S. Geological Survey Digital Data Series 79.
Addition of Misc. Investigations Series I-2150-A
Williams, S.J., Penland, S., Sallenger, A.H., Jr., eds., 1992, Louisiana barrier island erosion study: atlas of shoreline change in Louisiana from 1853 to 1989: U.S. Geological Survey Miscellaneous Investigations Series I-2150-A.

Data layers available in the LASED IMS include cores and samples, seismic reflection data, bathymetry, geology, sidescan sonar mosaics, and basemaps. Metadata are provided for each layer through the metadata tool.

Cores and Samples Folder:

USGS Locations and data associated with sediment cores collected by the USGS between 1983 and 2001.  Cores are hyperlinked to core photos if available.  Analytical data are held within data attribute tables.

Ship Shoal Locations and data associated with sediment cores collected in the vicinity of Ship Shoal by the USGS and Louisiana Geological Survey (LGS) between 1983 and 1992.  Analytical data are held within data attribute tables.

Lake Pontchartrain basin Samples collected by the USGS in the Lake Pontchartrain basin and analyzed for lead, zinc, and sand content.  Analytical data are held within data attribute tables.

usSEABED (DS 146) usSEABED is a database of sediment and rock distributions in the waters off the United States. Data layers presented here include word-based and lab-based analyses of surficial and subbottom sampling. These data have been released via usSEABED: Gulf of Mexico and Caribbean (Puerto Rico and U.S. Virgin Islands) Offshore Surficial Sediment Data Release (USGS Data Series 146) (more info).

Seismic Reflection Data Folder:

USGS Tracklines and shotpoint locations of boomer and chirp data collected by the USGS between 1994 and 2002. Tracklines are hyperlinked to printable processed profiles. Some datasets also include interactive seismic reflection profiles which allow a user to obtain a geographic location and depth from the profile for a cursor position using IE 6 or Firefox 1.5.

LaCoss Tracklines and shotpoint locations of boomer data collected by the USGS, LGS, Louisiana University Consortium (LUMCON), and Minerals Management Service (MMS) between 1982 and 1984.

Bathymetry Folder:
Bathymetry is available for Lake Pontchartrain, Lake Maurepas, Lake Borgne, offshore Louisiana, and the Gulf of Mexico. Louisiana topobathymetry raster imagery is also included.

Geology Folder:
Contains layers for earthquakes (from LGS), surface faults (from Coastal Environments, Inc.), surficial geology (USGS), and geology (USGS).

Sidescan Sonar Mosaics Folder:
Sidescan sonar mosaics are available for four locations in or near Lake Pontchartrain. These areas are small, and close-in zooming may be necessary to see them properly. The data were collected by the USGS in 1998.

Sea-Floor Change Atlas Folder:
Contains scanned, georectified images from the Louisiana Barrier Island Erosion Study: Atlas of sea-floor changes from 1878 to 1989 (USGS Misc. Investigations Series I-2150-B, List and others, 1994).

Basemap Folder:
Basemap layers are divided into the following subfolders: grids, infrastructure, political entities (states, parishes, cities), shorelines and water features, and miscellaneous information.

Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://coastal.er.usgs.gov/lased Page Contact Information: B. Dwyer Page Last Modified: Thursday, September 7, 2006

USGS	Locations and data associated with sediment cores collected by the USGS between 1983 and 2001. Cores are hyperlinked to core photos if available. Analytical data are held within data attribute tables.
Ship Shoal	Locations and data associated with sediment cores collected in the vicinity of Ship Shoal by the USGS and Louisiana Geological Survey (LGS) between 1983 and 1992. Analytical data are held within data attribute tables.
Lake Pontchartrain basin	Samples collected by the USGS in the Lake Pontchartrain basin and analyzed for lead, zinc, and sand content. Analytical data are held within data attribute tables.
usSEABED (DS 146)	usSEABED is a database of sediment and rock distributions in the waters off the United States. Data layers presented here include word-based and lab-based analyses of surficial and subbottom sampling. These data have been released via usSEABED: Gulf of Mexico and Caribbean (Puerto Rico and U.S. Virgin Islands) Offshore Surficial Sediment Data Release (USGS Data Series 146) (more info).

USGS	Tracklines and shotpoint locations of boomer and chirp data collected by the USGS between 1994 and 2002. Tracklines are hyperlinked to printable processed profiles. Some datasets also include interactive seismic reflection profiles which allow a user to obtain a geographic location and depth from the profile for a cursor position using IE 6 or Firefox 1.5.
LaCoss	Tracklines and shotpoint locations of boomer data collected by the USGS, LGS, Louisiana University Consortium (LUMCON), and Minerals Management Service (MMS) between 1982 and 1984.